Subaru Subaru Legacy 2004-2008 Fuel System Specifications
Explore detailed fuel specifications for the 2004-2008 Subaru Legacy, including fuel type, tank capacity, economy, and emission standards. Essential for maintenance, repairs, and performance optimization.
Overview Specifications
This document provides detailed fuel specifications for the 2004-2008 Subaru Legacy. It includes information on fuel types, fuel economy, tank capacity, and other related technical details. Use this guide to understand the fuel requirements and performance metrics for your vehicle. The document is organized into sections for easy navigation, with quick reference tables for key specifications.
How to Use
Use the search function to quickly locate specific fuel-related terms or specifications. Enter keywords like 'fuel type' or 'tank capacity' to find relevant information.
Navigate through the document using the section titles and subsections. Each section is labeled clearly, and subsections provide detailed points for easy reference.
Key Specifications
Fuel Type
Unleaded (87+ octane)
Fuel Tank Capacity
16.9 gallons
City MPG
20-22 MPG
Highway MPG
27-30 MPG
Combined MPG
23-25 MPG
Available Specifications
Fuel Types and Requirements
This section covers the types of fuel recommended for the 2004-2008 Subaru Legacy, including octane ratings and any special requirements for optimal performance.
Fuel Types and Requirements
This section covers the types of fuel recommended for the 2004-2008 Subaru Legacy, including octane ratings and any special requirements for optimal performance.
Recommended Fuel Type
- Use unleaded gasoline with an octane rating of 87 or higher.
- Premium fuel (91 octane or higher) is recommended for turbocharged models.
- Avoid using diesel or ethanol blends above 10% (E10).
- Using lower octane fuel may reduce performance and fuel efficiency.
Fuel Additives
- Subaru does not recommend the use of aftermarket fuel additives.
- Fuel system cleaners may be used sparingly, but consult the owner's manual first.
- Avoid additives containing methanol or silicone.
- Regular maintenance is more effective than additives for fuel system health.
Fuel Economy
This section provides details on the fuel efficiency of the 2004-2008 Subaru Legacy, including city, highway, and combined MPG ratings.
Fuel Economy
This section provides details on the fuel efficiency of the 2004-2008 Subaru Legacy, including city, highway, and combined MPG ratings.
MPG Ratings
- City MPG: 20-22 (depending on engine and drivetrain).
- Highway MPG: 27-30 (depending on engine and drivetrain).
- Combined MPG: 23-25 (depending on engine and drivetrain).
- Turbocharged models may have slightly lower MPG ratings.
Factors Affecting Fuel Economy
- Driving habits, such as aggressive acceleration, can reduce fuel efficiency.
- Proper tire inflation improves MPG.
- Regular maintenance, including oil changes and air filter replacement, is essential.
- Cold weather can temporarily reduce fuel economy.
Fuel Tank and Capacity
This section outlines the fuel tank specifications for the 2004-2008 Subaru Legacy, including capacity and refueling tips.
Fuel Tank and Capacity
This section outlines the fuel tank specifications for the 2004-2008 Subaru Legacy, including capacity and refueling tips.
Fuel Tank Capacity
- Fuel tank capacity: 16.9 gallons (64 liters).
- Reserve fuel capacity: Approximately 2.5 gallons (9.5 liters).
- Refuel when the fuel light comes on to avoid running out of fuel.
- Overfilling the tank can cause fuel spillage and damage the evaporative emissions system.
Refueling Tips
- Always turn off the engine before refueling.
- Use the correct fuel grade as specified in the owner's manual.
- Avoid topping off the tank after the pump automatically shuts off.
- Check the fuel cap for proper sealing after refueling.
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Component Specifications
Overview
- Type
- Gasoline
- Configuration
- Multi-port fuel injection
- Platform
- Subaru Legacy 2004-2008
- Material
- Steel and plastic composite
- Location
- Under rear seat, center of vehicle
Dimensions
- Tank Capacity
- 16.9 gallons (64 liters)
- Tank Length
- 34.5 inches (87.6 cm)
- Tank Width
- 24.8 inches (63 cm)
- Tank Height
- 12.2 inches (31 cm)
- Fuel Line Diameter
- 0.375 inches (9.5 mm)
- Fuel Pump Pressure
- 43.5 psi (300 kPa)
- Fuel Filter Size
- 2.5 inches x 1.5 inches (6.35 cm x 3.81 cm)
Materials
- Tank
- High-density polyethylene with steel reinforcement
- Fuel Lines
- Nitrile rubber with steel braiding
- Fuel Pump
- Stainless steel and plastic composite
- Fuel Filter
- Cellulose and resin composite
Features
- Fuel Delivery
-
- Sequential multi-port fuel injection
- Electronic fuel pressure regulation
- Returnless fuel system
- Tank Features
-
- Impact-resistant construction
- Internal baffles for fuel slosh reduction
- Integrated fuel pump module
- Vapor recovery system
- Sensors
-
- Fuel level sensor
- Fuel temperature sensor
- Fuel pressure sensor
- Emissions
-
- EVAP system integration
- Low-permeation fuel lines
- Charcoal canister for vapor storage
Safety Features
- Crash Protection
-
- Automatic fuel shutoff in collisions
- Reinforced tank structure
- Fire Prevention
-
- Flame arrestor in fuel filler neck
- Rollover valve in fuel tank
- Leak Prevention
-
- Double-sealed fuel pump assembly
- Corrosion-resistant fuel lines
Comfort Features
- Refueling
-
- Easy-access fuel filler door
- Capless fuel filler system
- Noise Reduction
-
- Insulated fuel pump
- Vibration-dampened fuel lines
- Driving Range
-
- Optimized fuel efficiency
- Extended range with 16.9-gallon capacity
Accessories
- Fuel Additives
-
- Fuel system cleaner
- Octane booster
- Fuel stabilizer
- Upgrades
-
- High-flow fuel pump
- Performance fuel filter
- Stainless steel fuel lines
- Maintenance Tools
-
- Fuel pressure tester
- Fuel line disconnect tool
- Fuel filter wrench
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Inspect fuel lines for leaks
- Replace fuel filter
- Check fuel pump pressure
- Inspect fuel tank for damage
- Test EVAP system functionality
- Maintenance Notes
- Use only unleaded gasoline with a minimum octane rating of 87. Avoid ethanol blends above 10%.
Warranty
- Basic Coverage
- Miles: 36,000Years: 3Coverage: Fuel pump and tank defects
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: EVAP system components
- Corrosion Warranty
- Miles: UnlimitedYears: 5Coverage: Fuel tank perforation
- Extended Coverage
- Miles: 100,000Years: 7Coverage: Fuel system components with extended plan
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Injection molding for fuel tank
- Robotic assembly for fuel pump module
- Precision welding for fuel lines
- Quality Control
- Pressure Testing: All fuel tanks tested to 30 psiLeak Testing: 100% leak detection for fuel linesPerformance Testing: Fuel pumps tested for flow rate and pressure
- Sustainability Practices
-
- Recycled materials in fuel tank construction
- Low-VOC fuel line materials
- Energy-efficient manufacturing processes
- Production Metrics
- Annual Production: 500,000 unitsDefect Rate: 0.01%Recycling Rate: 95% of manufacturing waste
Service Information for fuel Service
Maintenance and service requirements specific to the fuel system
- Inspect fuel lines and connections
- Replace fuel filter
- Check fuel pump operation
- Test fuel pressure
- Inspect EVAP system components
Use OEM parts for replacements to maintain system integrity
- Perform full fuel system inspection
- Clean fuel injectors
- Check fuel tank for sediment
- Test fuel pressure regulator
- Inspect fuel filler neck and cap
Specialized tools required for fuel system diagnostics
- Replace fuel pump assembly
- Inspect and clean fuel tank
- Replace all fuel lines
- Perform complete EVAP system test
- Check and replace fuel level sensor if needed
Major service requiring fuel system depressurization and proper safety equipment
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is compatible with the 2004-2008 Subaru Legacy?
What type of fuel is compatible with the 2004-2008 Subaru Legacy?
The 2004-2008 Subaru Legacy is designed to run on unleaded gasoline with an octane rating of 87 or higher. Using premium fuel (91 octane or higher) is recommended for optimal performance, especially in turbocharged models like the Legacy GT. Avoid using diesel, E85, or any fuel with more than 10% ethanol, as it may damage the engine or fuel system components.
Q2 What are the maintenance requirements for the fuel system in a 2004-2008 Subaru Legacy?
What are the maintenance requirements for the fuel system in a 2004-2008 Subaru Legacy?
Regular maintenance for the fuel system includes inspecting and replacing the fuel filter every 30,000 miles, checking fuel lines for leaks or wear, and using fuel injector cleaner every 15,000 miles to prevent clogging. Additionally, ensure the fuel cap is tightly sealed to maintain proper pressure and avoid triggering the check engine light.
Q3 How do I replace the fuel filter in a 2004-2008 Subaru Legacy?
How do I replace the fuel filter in a 2004-2008 Subaru Legacy?
To replace the fuel filter, first, relieve fuel system pressure by disconnecting the fuel pump fuse and running the engine until it stalls. Locate the fuel filter under the car near the fuel tank. Disconnect the fuel lines using a line wrench, remove the old filter, and install the new one, ensuring the flow direction arrow points toward the engine. Reconnect the lines and test for leaks.
Q4 What should I do if my 2004-2008 Subaru Legacy has poor fuel economy?
What should I do if my 2004-2008 Subaru Legacy has poor fuel economy?
Poor fuel economy can result from clogged fuel injectors, a dirty air filter, or incorrect tire pressure. Start by checking and replacing the air filter if necessary. Use a fuel injector cleaner and ensure tires are inflated to the recommended pressure. If issues persist, inspect the oxygen sensors, spark plugs, and fuel system for potential problems.
Q5 How can I optimize the fuel efficiency of my 2004-2008 Subaru Legacy?
How can I optimize the fuel efficiency of my 2004-2008 Subaru Legacy?
To optimize fuel efficiency, maintain proper tire pressure, use high-quality fuel, and replace air and fuel filters regularly. Avoid aggressive driving and excessive idling. Ensure the engine is tuned, and spark plugs are in good condition. Using synthetic oil and keeping the vehicle lightweight can also improve mileage.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2004-2008 Subaru Legacy Service Manual
Coming SoonComprehensive guide covering maintenance, repairs, and technical specifications for the 2004-2008 Subaru Legacy.
Subaru Technical Service Bulletin: Fuel System Updates
Coming SoonDetails updates and fixes for fuel system components in the 2004-2008 Subaru Legacy.
Subaru Legacy Parts and Accessories Catalog
Coming SoonCatalog listing genuine parts and accessories for the 2004-2008 Subaru Legacy, including fuel system components.
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Technical Information
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